title: Longevity of the formaldehyde-preserved Hancock porcine heterograft.
mesh_terms: D000328:Adult; D001021:Aortic Valve / Q000601:surgery; D001705:Bioprosthesis; D002114:Calcinosis / Q000139:chemically induced; D005260:Female; D005557:Formaldehyde / Q000009:adverse effects*; D005976:Glutaral; D006350:Heart Valve Prosthesis; D006801:Humans; D008297:Male; D008875:Middle Aged; D008943:Mitral Valve / Q000601:surgery; D012086:Reoperation; D014261:Tricuspid Valve / Q000601:surgery
chemical_list: D005557:Formaldehyde; D005976:Glutaral